Can I have my old XP settings in a new installation?

I am having ME in C: and XP in D:. I am planning to format D: and install XP freshly. Can I take my old settings to the new installation? If yes, how to?

I also have a second instalattion of XP in d: itself. How to erase it without disturbing the old installation? (Old is in d:\winnt and new is in d:\windows. But only one program files folder and other folders.)